Added a component to eat bodies for health #8922 (#16345)

Content.Server/Devour/DevourSystem.cs

@@ -0,0 +1,51 @@
+using Content.Shared.Devour;
+using Content.Server.Body.Systems;
+using Content.Shared.Humanoid;
+using Content.Shared.Chemistry.Components;
+using Content.Server.Devour.Components;
+using Content.Shared.DoAfter;
+using Robust.Shared.Serialization;
+
+namespace Content.Server.Devour;
+
+public sealed class DevourSystem : SharedDevourSystem
+{
+    [Dependency] private readonly BloodstreamSystem _bloodstreamSystem = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<DevourerComponent, DevourDoAfterEvent>(OnDoAfter);
+    }
+
+    private void OnDoAfter(EntityUid uid, DevourerComponent component, DevourDoAfterEvent args)
+    {
+        if (args.Handled || args.Cancelled)
+            return;
+
+        var ichorInjection = new Solution(component.Chemical, component.HealRate);
+
+        if (component.FoodPreference == FoodPreference.All ||
+            (component.FoodPreference == FoodPreference.Humanoid && HasComp<HumanoidAppearanceComponent>(args.Args.Target)))
+        {
+            ichorInjection.ScaleSolution(0.5f);
+
+            if (component.ShouldStoreDevoured && args.Args.Target is not null)
+            {
+                component.Stomach.Insert(args.Args.Target.Value);
+            }
+            _bloodstreamSystem.TryAddToChemicals(uid, ichorInjection);
+        }
+
+        //TODO: Figure out a better way of removing structures via devour that still entails standing still and waiting for a DoAfter. Somehow.
+        //If it's not human, it must be a structure
+        else if (args.Args.Target != null)
+        {
+            QueueDel(args.Args.Target.Value);
+        }
+
+        _audioSystem.PlayPvs(component.SoundDevour, uid);
+    }
+}
+